Summary & Overview

CPT 21320: Closed Reduction of Nasal Bone Fracture with Splinting

CPT code 21320 covers closed reduction of nasal bone fractures with application of an external stabilization device. This is a commonly performed acute facial trauma procedure that restores nasal alignment and function while providing temporary immobilization for healing. Nationally, timely management of nasal fractures affects patient outcomes for breathing, cosmesis, and risk of long-term deformity, and the code is relevant across emergency, urgent care, and outpatient surgical settings.

Key payers addressed include Aetna, Blue Cross Blue Shield, Cigna Health, UnitedHealthcare, and Medicare. Readers will find a concise overview of the clinical indication for the code, typical settings where the service is delivered, and the reimbursement and coding context relevant to commercial and public payers. The publication outlines benchmarks for utilization and payment (where available), common modifier use, and coding considerations that influence claim processing.

The report also provides clinical context about when closed reduction with splinting is indicated versus alternatives, expected procedural elements, and typical post-procedure stabilization. Data not available in the input are noted where applicable. This resource is intended for coding professionals, practice managers, and clinicians involved in facial trauma care and medical billing.

AetnaBlue Cross Blue ShieldCigna HealthUnitedHealthcareMedicareCPT 21320nasal fractureclosed reductionfacial traumasplintingemergency medicineambulatory surgerymedical codingprocedural coding

Billing Code Overview

CPT code 21320 describes a closed reduction of a nasal bone fracture with application of an external stabilization device (for example, a splint). The procedure entails manual manipulation of the nose to realign fractured nasal bones without creating a surgical incision, followed by placement of a splint or similar device to maintain position during bone healing.

Service type: Closed reduction and external stabilization of nasal bone fracture
Typical site of service: Emergency department, urgent care, or outpatient ambulatory surgery setting depending on clinical status and need for anesthesia

Clinical & Coding Specifications

Clinical Context

A typical patient is an adult who presents to the emergency department or an urgent care clinic after facial trauma from a fall, sports injury, or interpersonal altercation. The patient reports nasal pain, swelling, nasal obstruction, epistaxis, and visible deformity. On physical exam the provider notes nasal bone displacement without gross open wound or complex midface fractures. Initial assessment includes facial and nasal inspection, anterior rhinoscopy, and targeted facial radiographs or CT if clinically indicated. After informed consent, closed reduction of the nasal bone fracture is performed, typically within 14 days of injury, using local anesthesia with or without conscious sedation (or general anesthesia in pediatric or uncooperative patients). The provider manipulates the nasal bones to realign the dorsal and lateral nasal contours and then applies external stabilization such as a nasal splint or internal packing to maintain position during healing. Post-procedure care includes analgesia, instructions to avoid nasal trauma, possible antibiotics if indicated, follow-up in 1–2 weeks for splint removal and reassessment, and documentation of technique, anesthesia, findings, and device applied.

Coding Specifications

Modifier	Description	When to Use
`22`	Increased procedural services	Use when work or complexity substantially exceeds typical for closed nasal fracture reduction (document justification).
`23`	Unusual anesthesia	Use when general anesthesia is required for an otherwise non-anesthetized procedure (document reason).
`26`	Professional component	Use if billing only the physician professional component separate from a facility or technical component.
`50`	Bilateral procedure	Use when closed reduction is performed on both left and right nasal bones and payer requires bilateral reporting.
`51`	Multiple procedures	Use when additional unrelated procedures are performed the same day (subject to payer bundling rules).
`52`	Reduced services	Use when the procedure is partially reduced or not completed (document extent and reason).
`53`	Discontinued procedure	Use when procedure is terminated before completion for reasons outside the provider’s control (document reason).
`59`	Distinct procedural service	Use to indicate a separate, distinct procedure not normally reported together when applicable (document separate anatomic site or isolated service).
`62`	Two surgeons	Use when two surgeons work together as primary surgeons performing distinct portions of the procedure.
`76`	Repeat procedure by same physician	Use when the same physician repeats the procedure during the postoperative period.
`77`	Repeat procedure by another physician	Use when a different physician repeats the procedure during the postoperative period.
`78`	Return to OR for related procedure	Use when patient returns to the operating room for a related procedure during the global period.
`79`	Unrelated procedure or service by same physician during postoperative period	Use when an unrelated procedure is performed during the global period.

Taxonomy Code	Specialty	Notes
`207RC0000X`	Otolaryngology (ENT)	Common specialists who perform nasal fracture reductions and nasal stabilization.
`207VP0126X`	Plastic Surgery	Performs nasal fracture management, particularly when cosmetic concerns exist.
`208600000X`	Oral and Maxillofacial Surgery	Manages facial fractures including nasal bone reductions in trauma settings.
`207Q00000X`	Family Medicine	May perform closed reductions in urgent care or office settings when skilled and credentialed.
`208D00000X`	Emergency Medicine	Frequently performs initial reduction and stabilization in the ED or urgent care.

Related Diagnoses

ICD-10 Code	Description	Clinical Relevance
`S02.2XXA`	Fracture of nasal bones, initial encounter	Common primary diagnosis indicating nasal bone fracture requiring closed reduction.
`S09.83XA`	Other specified injuries of face, initial encounter	Used when nasal fracture occurs with other facial soft tissue injuries needing evaluation.
`S01.4XXA`	Laceration of nose, initial encounter	Relevant when nasal fracture is accompanied by a laceration impacting management or anesthesia choice.
`J34.2`	Deviated nasal septum	Frequently evaluated in the context of nasal trauma and may impact airway or cosmetic outcomes.
`R07.0`	Pain in throat	May be present with associated facial trauma and assessed during evaluation.
`R04.0`	Epistaxis	Common presenting symptom with nasal fractures; influences hemostasis and packing decisions.

Related CPT Codes

CPT Code	Description	Relationship to This Procedure
`21320`	Closed treatment of nasal bone fracture; without manipulation requiring anesthesia (nasal packing or external splinting)	Primary procedure for closed reduction and stabilization of nasal bone fractures.
`21325`	Closed treatment of nasal bone fracture; requiring anesthesia	Used when closed reduction requires general anesthesia or more extensive anesthesia support.
`30140`	Submucous resection inferior turbinate, partial or complete, any method	May be performed later if nasal obstruction persists after fracture healing and septal issues are present.
`30520`	Septoplasty or submucous resection, with or without cartilage graft	Performed in staged fashion for persistent nasal obstruction or septal deviation identified during or after fracture management.
`99070`	Supplies and materials (e.g., splints, nasal packs)	Used to report non-physician supplies associated with splinting or packing if payer allows separate billing.
`99100`	Anesthesia for patient of extreme age, younger than 1 year and older than 70 years	May apply when patient age adds anesthesia complexity during sedation for reduction.